参数资料
| 型号： | AS1339-BWLT |
| 厂商： | ams |
| 文件页数： | 2/26页 |
| 文件大小： | 0K |
| 描述： | IC CONV BUCK 650MA 16-WLP |
| 标准包装： | 1 |
| 应用： | 转换器，WCDMA、NCDMA 功率放大器应用 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 3.85 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFBGA，WLCSP |
| 供应商设备封装： | 16-WLP（2x2） |
| 包装： | 标准包装 |
| 其它名称： | AS1339-BWLTDKR |
Da t as heet
AS1339
6 5 0 m A R F St e p - D o w n D C - D C f o r PA, w i t h t w o L D O s
1 General Description
2 Key Features
The AS1339 is a high-frequency step-down converter
optimized for dynamically powering the power amplifier
(PA) in WCDMA or NCDMA handsets. The device uses
a 110m Ω typical bypass FET to power the PA directly
from the battery during high-power transmission. The IC
integrates two 10mA low-noise, low-dropout regulators
(LDOs) for PA biasing.
With a switching frequency of 2MHz, the device allows
optimization for smallest solution size or highest
efficiency. The AS1339 supports fast switching using
small ceramic 10 μ F input and 4.7μF output capacitors to
maintain low ripple voltage.
The AS1339 uses an analog input driven by an external
DAC to control the output voltage linearly for continuous
PA power adjustment. The gain from REFIN to OUT is
2.5V/V. At high-duty cycle, the device automatically
switches to a bypass mode, connecting the input to the
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Fixed Switching Frequency: 2MHz
PA Step-Down Converter
Low Dropout Voltage
Low Output-Voltage Ripple
Dynamic Output Voltage Control (0.8V to 3.75V)
30μs Settling Time for 0.8V to 3.4V Output Voltage
Change
650mA Output Drive Capability
Two 10mA Low-Noise LDOs
Low Shutdown Current
Supply Voltage Range: 2.7V to 5.5V
Thermal Shutdown
16-pin WLP (2x2mm) package
output through a low-impedance MOSFET. The LDOs
are designed for low-noise operation, wherein each LDO
in the device is individually enabled through its own logic
control interface. The device is available in a 16-pin
WLP (2x2mm) package.
Figure 1. AS1339 - Typical Operating Circuit
3 Applications
The AS1339 is ideal for WCDMA/NCDMA cellular
handsets, Wireless PDAs, and Smartphones.
V IN
2.7V to 5.5V
10μF
IN1A
IN1B
PAA
PAB
LX
V PA
0.8V to 3.75V
2.2μH
4.7μF
Analog Control
PA ON/OFF
REFIN
PA_EN
AS1339
PGND
NC
LDO1 ON/OFF
LDO2 ON/OFF
NC
V IN
2.7V to 5.5V
EN1
EN2
TEST
IN2
LDO1
LDO2
2.85V
0.1μF
2.85V
1μF
AGND
Revision 1.05
0.1μF
1 - 25
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1339-DB | 制造商:ams 功能描述:Evaluation Board |
| AS1339-EB | 功能描述:电源管理IC开发工具 AS1339 Evaluation Board RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| AS133R0HLF | 制造商:TT Electronics / IRC 功能描述:AS133R0HLF |
| AS133R0JLF | 制造商:TT Electronics / IRC 功能描述:AS133R0JLF |
| AS133R2FLF | 制造商:TT Electronics / IRC 功能描述:AS133R2FLF |
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